Half to linus ii



(No Model.) 4 Sheets-Sheet 1. G. P. DUNN. UPPER SKIVING MACHINE.

Patented Apr. 22, 1890.

w M A i h 0 N lNVENUFr %m a/Mu m: nomns Prrsns cm, 010 mm wAsmNm'oN, a. c.

(No ModeL) 4 Sheets-Sheet 2. G. F. DUNN.

UPPER SKIVING MACHINE.

No. 426,251. Patented Apr. 22, 1890.

(No Model.) 4 Sheets-8l1eet 3. G. F. DUNN.

UPPER SKIVING MACHINE.

No. 426,251. Patented Apr. 22, 1890.

INVEN'T URL- wyw j (No Model.) 4 Sheets-Sheet G. F. DUNN.

UPPER SKIVING MACHINE. No. 426,251. Patenteg Apr. 22, 1890.

iii

UNITED STATES PATENT OFFICE.

GEORGE F. DUNN, OF BROCKTON, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO LINUS H. SHAV, OF SAME PLACE.

UPPER-SKIVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 426,251, dated April 22, 1890.

- Application filed March 29, 1889. Serial No. 305,249. (No model.)

To all whom it may concern.-

Be it known that I GEORGE F. DUNN, of Brockt-on, in the county of Plymouth and State of Massachusetts, have invented certain Improvements in Shoe Machinery, of which the following is a specification.

This invention relates to certain improvements in a machine whereby the toe portion of the vamp is skived to a thin edge, so that it may lie smoothly on and around the last. The machine also in the skiving operation provides the vamp with a central longitudinal line to guide the fitter in sewing the upper thereto, and a transverse line somewhat curved to indicate where the toe-cap is to be sewed. It also marks on the vamp a numeral which represents the size'number of the shoe.

In the description of the said invention which follows reference is made to the accompanying drawings, forming a part hereof, and in which- Figure 1 is an exterior side elevation of the improved machine, and Fig. 2 a plan of the same. Figs. 3 and 4c are exterior side views of portions of the machine, illustrating the movement and position under different circumstances of certain parts of the invention. Figs. 5 to 13, inclusive, are details of the invention, as hereinafter described.

Similar letters of reference indicate similar parts in all the figures.

Referring to the drawings, A is the frame of the machine, provided with'suitable legs a. The upper surface of the frame A forms the bed of the machine and is designated by b.

B is a throat-gage, around which the vamp C is placed before the same is operated upon, as hereinafter described. The throat-gage consists of a block 0, adapted to slide in a slot d in the bed b. As viewed from its end, this block shows a T-head. (See Figs. 12 and 13.) Bars 0, curved so as to fit the inner edge of the throat of. the vamp, are pivoted to the block 0 by means of links f and the rackbars 9. The throat-gage is distended or contracted to suit vamps of various sizes by means of a pinion h, situated in a cavity in the said block a and in gear with the teeth of the rack-bars. This pinion is revolved through the agency of a thumb-screw i. A second thumb-screw j is used to secure the links f after the throat-gage is set to the required size. The throat-gage is moved to its proper place longitudinally of the machine and then secured thereat by means of a tightening-bolt 7t and nut Z.

O O are arms pivoted to lugs m on the bed '1). These arms are placed one of them on each side of the frame, and at their free ends they are provided with the vertical studs D.

E is a presser-foot having lugs n at its ends which fit around the vertical studs D, as'seen particularly in Figs. 1, 2, 3, and 4. This presserfoot consists, primarily, in a plate which extends across the bed, and its office is to hold down the vamp tightly on the bed during the skiving operation, which consists in drawing the skiving knife, hereinafter described, lengthwise to the toe portion of the vamp. It also serves to press the vamp upon the marking and numbering devices heretofore alluded to and hereinafter described.

Spiral springs F, coiled around the vertical studs D, are held down by means of nuts 0 7 5 and serve to give to the presser-foot a yieldin g pressure on the vamp.

G is the skiving-knife, and H the knife carrier or frame, in which the knife is held in an inclined position. (See particularly Figs. 1, 3, 4, and 6.) A plan of the knifecarrier is shown in Fig. 9, and it will be seen that it consists of the side bars I and the transverse bars J and K. The rear transverse connecting-bar K has a central pin L, to which aconnecting-rod M is attached. The other end of this connecting-rod is united to the pin N of a crank O 011 a shaft P. This shaft is driven from the main driving-shaft Q through the medium of the gears R and S. (See Fig. 1.)

The knife-frame H has lugs T, carrying pins U, which pass through slots V in the frame A of the machine and enter channels IV in the arms O. The knife-frame has also two other pins X, which merely rest in the slots V of the frame. The shape of the channels 1V in the arms 0 is shown particularly in Fig. 5, which is an inner side view of one of the said arms. The shape of the slots V in the frame A is illustrated particularly in Fig. 7, which is an outside view of a portion of the frame. It will be seen that the channels in the arms C are turned down at their rear ends and the slots in the frame turned up at their front ends. WVhen the pins U are in the straight portion of the slots and channels, as shown in Fig. l, the arms 0 and the presser-foot are in their lowest position and the knife-frame at its greatest angular position with reference to a vertical line; but when the crank-pin is at 19, Fig. 3, or beginning its stroke, the pins U are drawn up into the curved portion of the slots V in the frame, and as their ends rest in the channels of the arms 0 the said arms are lifted, and with them the presser-foot E. The lifting of the presserfoot admits of the placing in position of the vamp. I11 the same operation the knife-frame is tilted toward a vertical line. When the crank-pin is at q, Fig. 4, the pins U are in a straight portion of the slots V in the frame, but their ends rest in the curved portion of the channels IV in the arms C. The knifeframe is in its normal position, but the arms and presser-foot are raised, which allows of the removal of the vamp, which in the passage of the crank-pin from one extreme position to the other has been operated upon, as hereinafter described.

The knife G is secured to the knife-frame in any suitable manner; but the depth of its out is regulated by screws 0, which pass through interiorly-tln'eaded lugs s, which constitute parts of the knife-frame and rest on the upper edge of the knife-block t, which is a movable part of the knife-frame.

A roller Y, confined in lugs 14 on the knifeframe, moves in advance of the knife and serves to keep the vamp fiat on the bed.

Referring particularly to Figs. 9 and 10, which represent a plan and a section of a part of the bed, A and B'are respectively straight and curved projections, which are pressed into the under side of the leather vamp as the presser-foot presses upon it, and thereby produces the lines a and 1). (Shown in dots in Fig. 2 and used, as before stated, in guiding the fitter in attaching thereto the upper and the toe-cap.)

The marking of the vamp with a numeral to indicate its size is effected by means of a wheel 0, having raised numbers (1 on its edge. This wheel is shown particularly in Figs. 9, 10, and 11. The shaft 6 of this wheel rests in hangers f, and one hanger has a projection g, through which a pin h is inserted. The end of this pin enters one of the holes 1" in the wheel. By this means the wheel can be held with any one of the raised numbers directly under the vamp.

It will be understood that other ways of holding the wheel in position can be employed without aifecting the nature of the invention.

Of course the bed must have an opening moves backward and forward, and at each of its extreme positions the presser-foot is raised, once to allow. of the placing of the vamp and again to admit of its removal. The knife. in the beginning of its stroke is nearer a vertical position than at any other time during its stroke. Consequently the entrance cut of the knife into the leather is curved.

I claim as my invention- 1. In a machine for skiving a shoe-vamp, a throat-gage having two distensible curved bars adapted to fit against the inner edges of the throat of the vamp and a central block to which said bars are connected by links, substantially as and for the purpose specified.

2. In a machine for skiving a shoe-vamp, a throat-gage having a central block, curved side bars, links connecting the block and curved side bars, a pinion situated in a cavity of the central block, and rack-bars pivoted to the curved side bars and in gear with the said pinion, substantially as specified.

3. In a machine for skiving a shoe-vamp, a throat-gage having two distensible curved bars adapted to fit the inner edge of the throat of the vamp, combined with a presserfoot and a horizontally-reciprocating knife, substantially as and for the purpose specified.

, 4.. In a machine for skiving a shoe-vamp, a frame, a pair of arms pivoted at the sides of the frame, having vertical studs at their free ends, a presser-foot with lugs which fit around the said studs, and springs to yieldingly hold the presser-foot down on the bed of the frame, combined with a reciprocating knife, substantially as specified.

5. In a machine for skiving a shoe-vamp, a frame the sides of which have slots with upturned ends, a pair of arms pivoted to said sides and having channels with downturned ends, and a presser-foot attached to the free ends of said arms, combined with a reciprocating knife-frame carrying an inclined knife, pins attached to said knife-frame and projecting into the slots in the frame, and other longer pins, also attached to the knife-frame, which pass through the slots in the frame and enter the channels in said presser-foot arms, whereby in the reciprocating movement of the knife-frame the knife is tilted toward a vertical line at the beginning of each stroke and the presser-foot raised at. the beginning and end of the same, substantially as and for the purpose specified.

6. In a machine for skiving a shoe-vamp, the bed of the frame provided with longitudinal and transverse marking projections, combined with a presser-foot having a vertical movement situated over the said projections and a reciprocating knife-frame carrying a knife to skive the vamp on the surface opposides of the frame, whereby as the frame is 10 site to that which is marked, substantially as reeiprocated the angle of the knife 1s changed specified. during its stroke, substantially'as and for the 7. In a machine for skiving a shoe-vamp, purpose specified.

a frame having slots in its sides with curved 1 T upturned ends, combined with a horizontally- GEORGE E DUB reciprocating knife -fra1ne carrying an in- WVitnesses:

clined knife, and pins attached to said knife- F. M. BIXBY,

frame and projecting into the slots in the JAMES J. MCDONOUGH. 

